Physics 2019 Waec Past Questions and Answers

Question 1 :

• WAEC 2019

A force of 6N acts horizontally on a stationary mass of 2kg for 4s. The kinetic energy gained by the mass is _________

Question 2 :

• WAEC 2019

A metal rod has a length of 100cm at 200°C. At what temperature will its length be 99.4cm. If the linear expansivity of the material of the nod is 2 à— 10\(^{-5}\)C\(^{-1}\)

Question 3 :

• WAEC 2019

A device consumes 100 W of power when connected to a 120 V source. Calculate its resistance.

A. 1.2\(\Omega\)
B. 12,000 \(\Omega\)
C. 20.0\(\Omega\)
D. 144\(\Omega\)

Question 4 :

• WAEC 2019

Which property of a wave remains constant when the wave travels from one medium into another?

A. Amplitude
B. Wavelength
C. Velocity
D. Frequency

Question 5 :

• WAEC 2019

The anomalous expansion of water occurs in the range

A. 0 °C to 100 °C
B. 0 °C to 4 °C
C. 4 °C to 100 C
D. -4 °C to 0 °C